A500/2000 mikronic chipram expansion help

DoogUK · 15 January 2009, 12:26

I've just purchased this chipram upgrade which i am hoping to install in my A2000.

Has anyone seen one? as i can find no documentation at all for it.

Can i use a 2mb agnus from a faulty A600 motherboard?

Any help greatly appreciated.

Zetr0 · 15 January 2009, 16:31

sooooo your the guy that snipped me

heys doogie, right m8y, gimmie a shot of the other side of the card and I shall be able to advise you further...

DoogUK · 15 January 2009, 16:36

There you go o'bearded one

Any help greatly appreciated

DoogUK · 15 January 2009, 16:38

I'm pretty sure the wire coming off requires a constant 5v.

Zetr0 · 15 January 2009, 16:45

no worries my friend,

before you yomp in an Agni, get your multi meter out... we need to make sure that you need a 318xx series or the other one (a500+)

bare with me m8

DoogUK · 15 January 2009, 16:48

Flopped out and ready

Zetr0 · 15 January 2009, 17:00

Quote:

Originally Posted by DoogUK

Flopped out and ready

nice timing... is the multi-meter ready as well?

Zetr0 · 15 January 2009, 17:04

okie doogie...

times up for testing... we need to test pin[42] for Ground

if its ground then its an 318 series 8375 (a600) if its NOT ground then its a 390 series (a500+)

Zetr0 · 15 January 2009, 17:15

Picture time

the two wires need to attach to the GARY chip m8... bare with me and I will hit some more specs, prolly be after dinner though.

DoogUK · 15 January 2009, 17:59

Being very limited on electronics skills...how do i test for ground on this pin?

Zetr0 · 15 January 2009, 18:16

find the ground plane on one of the other chips.

Now I would suggest one of the RAM chips (let me get a pdf... aha! there it is...)

now we can discover where the GND plane is... and then from that find out what pin 42 is upto

I would suspect the large plane on the outside/edge of the card as the ground plane...

DoogUK · 15 January 2009, 18:23

There's no continuity between those 2 points.

alexh · 15 January 2009, 18:57

Oooo, can I use these pics for BBoAH?

Hope you didn't get it from a guy called satiropan/urantia in Italy

He's posted all over the net that he's got one that doesn't work

http://www.amiga.org/modules/newbb/v...=45758&forum=8
http://amigaworld.net/modules/newbb/...orum=25#465573
http://groups.google.hr/group/it.com...0d0b2da98c87cf
http://www.nntp.it/comp-os-amiga/152...-micronik.html
http://74.125.77.132/search?q=cache:...ient=firefox-a

DoogUK · 15 January 2009, 19:15

Alex...i have emaoled them into the BBOAH after i could not find any info on this card.....i did get it from that italian bloke on Amiga.org but figured at 5 euro's its worth a shot.
Apparently a few of these chipram expansions don't work with certain revisions of A2000 mobo's..especialy the 6.2 and as mine is a 6.0...again...worth a shot.

If that still fails i'll try it in an A500 and last but not least...give it to Zetro to play with

alexh · 15 January 2009, 19:55

CDTV, that is the place to use a 2MB Agnus upgrade, if you dont have one then you should bally well go out now and buy one!

Although seeing as how you swapped me a CDTV keyboard for a buffered IDE interface I doubt you've got a CDTV anymore?

DoogUK · 15 January 2009, 19:58

I've always wanted a CDTV...it's on my to collect list.

But i realy think my 2000 would benefit..i'm sure it would speed up the DMA tranfers to the DKB2632 massively.

alexh · 15 January 2009, 20:05

Quote:

Originally Posted by DoogUK

i did get it from that italian bloke on Amiga.org but figured at 5 euro's its worth a shot.

As you can see from my links above, he paid €30 off ebay!

Quote:

Originally Posted by DoogUK

i'm sure it would speed up the DMA tranfers to the DKB2632 massively.

What makes you say that?

DoogUK · 15 January 2009, 20:19

I'm sure i read on Amiga.org that having 1mb of chipram is like a bottleneck in comparison to 2mb's when accessing 32bit ram...is it not true then?

musashi5150 · 15 January 2009, 20:24

Quote:

Originally Posted by DoogUK

I'm sure i read on Amiga.org that having 1mb of chipram is like a bottleneck in comparison to 2mb's when accessing 32bit ram...is it not true then?

Don't think so, no. It's a bit like saying if I buy 2 Ferraris I can go twice as fast

DoogUK · 15 January 2009, 20:27

Quote:

Originally Posted by musashi5150

Don't think so, no. It's a bit like saying if I buy 2 Ferraris I can go twice as fast

Valid point...but having double the onboard cache on a cpu greatly increases performance.

And the bugatti veyron has 2 v8 engines...say no more

15 January 2009, 12:26	#1
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	A500/2000 mikronic chipram expansion help I've just purchased this chipram upgrade which i am hoping to install in my A2000. Has anyone seen one? as i can find no documentation at all for it. Can i use a 2mb agnus from a faulty A600 motherboard? Any help greatly appreciated. Attached Thumbnails

15 January 2009, 16:36	#3
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	There you go o'bearded one Any help greatly appreciated Attached Thumbnails

15 January 2009, 17:04	#8
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	okie doogie... times up for testing... we need to test pin[42] for Ground if its ground then its an 318 series 8375 (a600) if its NOT ground then its a 390 series (a500+) Last edited by Zetr0; 15 January 2009 at 17:16.

15 January 2009, 17:15	#9
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Picture time the two wires need to attach to the GARY chip m8... bare with me and I will hit some more specs, prolly be after dinner though. Attached Thumbnails

15 January 2009, 18:16	#11
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	find the ground plane on one of the other chips. Now I would suggest one of the RAM chips (let me get a pdf... aha! there it is...) now we can discover where the GND plane is... and then from that find out what pin 42 is upto I would suspect the large plane on the outside/edge of the card as the ground plane... Attached Thumbnails

15 January 2009, 16:31	#2
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	sooooo your the guy that snipped me heys doogie, right m8y, gimmie a shot of the other side of the card and I shall be able to advise you further...

15 January 2009, 16:38	#4
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	I'm pretty sure the wire coming off requires a constant 5v.

15 January 2009, 16:45	#5
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	no worries my friend, before you yomp in an Agni, get your multi meter out... we need to make sure that you need a 318xx series or the other one (a500+) bare with me m8

15 January 2009, 16:48	#6
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	Flopped out and ready

15 January 2009, 17:59	#10
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	Being very limited on electronics skills...how do i test for ground on this pin?

15 January 2009, 18:23	#12
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	There's no continuity between those 2 points.

15 January 2009, 18:57	#13
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	Oooo, can I use these pics for BBoAH? Hope you didn't get it from a guy called satiropan/urantia in Italy He's posted all over the net that he's got one that doesn't work http://www.amiga.org/modules/newbb/v...=45758&forum=8 http://amigaworld.net/modules/newbb/...orum=25#465573 http://groups.google.hr/group/it.com...0d0b2da98c87cf http://www.nntp.it/comp-os-amiga/152...-micronik.html http://74.125.77.132/search?q=cache:...ient=firefox-a Last edited by alexh; 15 January 2009 at 19:07.

15 January 2009, 19:15	#14
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	Alex...i have emaoled them into the BBOAH after i could not find any info on this card.....i did get it from that italian bloke on Amiga.org but figured at 5 euro's its worth a shot. Apparently a few of these chipram expansions don't work with certain revisions of A2000 mobo's..especialy the 6.2 and as mine is a 6.0...again...worth a shot. If that still fails i'll try it in an A500 and last but not least...give it to Zetro to play with

15 January 2009, 19:55	#15
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	CDTV, that is the place to use a 2MB Agnus upgrade, if you dont have one then you should bally well go out now and buy one! Although seeing as how you swapped me a CDTV keyboard for a buffered IDE interface I doubt you've got a CDTV anymore? Last edited by alexh; 15 January 2009 at 20:05.

15 January 2009, 19:58	#16
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	I've always wanted a CDTV...it's on my to collect list. But i realy think my 2000 would benefit..i'm sure it would speed up the DMA tranfers to the DKB2632 massively.

15 January 2009, 20:19	#18
DoogUK Doogster Join Date: Dec 2007 Location: Dorset Posts: 1,069	I'm sure i read on Amiga.org that having 1mb of chipram is like a bottleneck in comparison to 2mb's when accessing 32bit ram...is it not true then?

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